Trigonella coerulescens (M.Bieb.) Halácsy subsp. ayvalikensis Erdoğan, Selvi & Tümen, 2017

Erdoğan, Eyüp, Selvi, Selami & Tümen, Gülendam, 2017, Trigonella coerulescens subsp. ayvalikensis (Fabaceae), a new taxon from Balιkesir, western Anatolia, Phytotaxa 319 (2), pp. 167-174 : 168

Trigonella coerulescens (M.Bieb.) Halácsy subsp. ayvalikensis Erdoğan, Selvi & Tümen subsp. nov. ( Figs. 1–6 )

Type:— Turkey. B 1 Balιkesir, Ayvalik, Küҫükköy, west of Badavut beach, sandy coast, 1 m, 12.III.2016, 39°16ʹ23ʺ N, 26°37ʹ43ʺ E, Selami Selvi 1616 (holotype: The herbarium of Balɪkesir University, Altιnoluk Vocational School, Programme of Medicinal and Aromatic Plants, isotypes: ANK, ISTE).

Annual herbaceous plant, 6–30 cm high, sterile stems prostrate; flowering stems ascending from decumbent base, or sub-erect–erect, sparsely villous hairy in lower part and densely villous hairy in upper part. Stipules ovate–lanceolate, 3– 6× 2–4 mm, entire, denticulate at apex. Leaves trifoliolate. 10–30 mm long. Petiole 10–23 mm, densely villous. Leaflets obovate–cuneate, dentate in upper part, densely villous, 2.5–9.0× 2–9 mm. Petiolule 0.8–1.2 mm long. Inflorescence 15–25 flowered, dense, capitate to oblong-cylindrical, 8–20× 7–13 mm in flower, 12–22× 10–16 mm in fruit. Peduncle 6–30 mm long and densely tomentose. Pedicel up to 0.5 mm long and tomentose. Bracts lanceolate, narrowly acute, 3–5×0.5–1.0 mm, villous hairy. Calyx tubular, densely villous–tomentose, 6–7 mm long; teeth subulate, 2.5–3.0 mm long, shorter than tube. Corolla blue, standard spatulate-shaped, emerginate at apex, 10–12×2.5–3.0 mm; wing narrowly rounded, ±spatulate, rounded at apex, 8.5–9.0×1.0– 1.5 mm; keel elliptic-shaped, obtuse at apex, 9–12×3.0– 3.5 mm. Androecium 7.5–8.0 mm and gynoecium 9.5–10.0 mm long. Legume oblong-lanceolate, 10–12× 2.5–2.7 mm (except beak), 13–15 veined; beak 2–6 mm long. Seeds ovoid–oblong, dark brown, tuberculate, 1.8–2.0× 1.2–1.5 mm. Flowering in March–April, fruiting in late April–May.

Figures

FIGURE 1. Trigonella coerulescens subsp. ayvalikensis (from the holotype).—A: Plant.—B: Capitulum in flower.—C: Capitulum in fruit.—D: Calyx with flower.—E: Leaflet.—F: Calyx.—G: Inside of calyx.All drawn from the type Selami Selvi 1616 (The herbarium of Balɪkesir University, Altιnoluk Vocational School, Programme of Medicinal and Aromatic Plants) by Özer Türkoğlu.

FIGURE 2. Trigonella coerulescens subsp. ayvalikensis in the nature. Photos by Selami Selvi.

FIGURE 3. Comparison of calyx shape of the three subspecies:—A: Trigonella coerulescens subsp. coerulescens.—B: Trigonella coerulescens subsp. kemerensis.—C: Trigonella coerulescens subsp. ayvalikensis. (Scale: 1 mm). Photos by Selami Selvi (Voucher specimens: Selami Selvi 1616, Selami Selvi 1625, Selami Selvi 1628; The herbarium of Balɪkesir University, Altιnoluk Vocational School, Programme of Medicinal and Aromatic Plants).

FIGURE 4. Comparison of bract shape of the three subspecies:—A: Trigonella coerulescens subsp. coerulescens.—B: Trigonella coerulescens subsp. kemerensis.—C: Trigonella coerulescens subsp. ayvalikensis. (Scale: 1 mm). Photos by Selami Selvi (Voucher specimens: Selami Selvi 1616, Selami Selvi 1625, Selami Selvi 1628; The herbarium of Balɪkesir University, Altιnoluk Vocational School, Programme of Medicinal and Aromatic Plants).

FIGURE 5. Comparison of leaflet shape of the three subspecies:—A: Trigonella coerulescens subsp. coerulescens.—B: Trigonella coerulescens subsp. kemerensis.—C: Trigonella coerulescens subsp. ayvalikensis. (Scale: 1 mm). Photos by Selami Selvi (Voucher specimens: Selami Selvi 1616, Selami Selvi 1625, Selami Selvi 1628; The herbarium of Balɪkesir University, Altιnoluk Vocational School, Programme of Medicinal and Aromatic Plants).

FIGURE 6. Distribution of Trigonella coerulescens subspayvalikensis (*), Trigonella coerulescens subsp.kemerensis (■), and Trigonella coerulescens subsp. coerulescens (▲) in Turkey.